Naphthalene Alkylation Method

A technology of decalinyl and decalinyl, applied in the field of decalinylation, can solve the problems of low selectivity, easy deactivation of catalysts and the like

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the catalyst is easily deactivated and the shape selectivity is not high in the naphthalene alkylation reaction in the prior art

Method used

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  • Naphthalene Alkylation Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take 50g water glass (SiO2 Content is 27.20wt%, modulus is 3.2), 0.85g aluminum sulfate, 96wt% sodium hydroxide 1.0g, deionized water 50g, 70wt% ethylamine aqueous solution 50g, ZSM-5 crystal seed 0.5g, mix to form The gel was left to stand for 6 hours, and then crystallized at 170°C for 14 hours. A white solid was obtained by filtration, and the solid was repeatedly washed with deionized water until the pH test paper was tested to be neutral. Drying gave 10.3 g of uncalcined powder. It is ZSM-5 zeolite by X-ray powder diffraction analysis.

[0028] (2) Take 10.3g of the powder obtained in the previous step, and use 1mol / L Mg(NO 3 ) 2 The 200ml solution was exchanged three times at room temperature, each time for 8 hours.

[0029] (3) Take the solid exchanged in the previous step, dry it, and roast it at 550° C. for 6 hours, and shape it to obtain a finished catalyst.

[0030] (4) The evaluation of the alkylation reaction of naphthalene and propylene was perfor...

Embodiment 2

[0033] (1) 600 grams of 40% silica sol, 38.9 grams of sodium aluminate (42% alumina content), 70.6 grams of 25% tetraethylammonium hydroxide (TEAOH), 5.0 grams of diethylamine (DEA), 168.0 grams of tetraethylammonium hydroxide Ethylammonium bromide (TEABr), 16.0 grams of sodium hydroxide, 136.0 grams of 25% ammonium hydroxide and 925.1 grams of water were mixed and stirred evenly at room temperature. Then, it was transferred to a stainless steel autoclave with a crystallization temperature of 140° C. and reacted for 96 hours. After the reaction, the crystalline product was filtered, washed with deionized water, and dried. According to X-ray powder diffraction analysis, it is zeolite beta with BEA structure.

[0034] (2) Take 200g of the powder obtained in the previous step, and use 1mol / L of Mg(NO 3 ) 2 The solution was exchanged three times at 80°C with 2000ml of solution, each time for 8 hours.

[0035] (3) Take the solid exchanged in the previous step, dry it, and roast...

Embodiment 3

[0039] (1) Get 5g of aluminum tert-butoxide (wt97%), 160g of diethyldimethylammonium hydroxide (wt20%), and mix 8g of sodium hydroxide, then add 160g of TEOS (wt98%) and 140g of deionized water , stir well at room temperature. Then it was transferred to a 1L stainless steel crystallization kettle, and stirred and crystallized at 150°C for 96 hours. After the crystallization reaction is completed, filter, wash the crystalline product with deionized water, and dry. According to X-ray powder diffraction analysis, it is UZM-8 zeolite with layered structure.

[0040] (2) Take 35 g of the powder obtained in the previous step, and exchange it with 500 ml of 2 mol / L magnesium chloride solution at 80° C. for three times, each time for 8 hours.

[0041] (3) Take the solid exchanged in the previous step, dry it, and roast it at 550° C. for 6 hours, and shape it to obtain a finished catalyst.

[0042] (4) Carry out the isomerization reaction of diisopropylnaphthalene on a 100ml reactor...

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Abstract

The invention relates to a method for naphthalene alkylation, which mainly solves the problems of poor catalyst selectivity and easy deactivation in the prior art. The present invention comprises the following steps: a) using silicon source, aluminum source, and organic amine template as raw materials, after hydrothermal crystallization, and then washing with deionized water, the zeolite precursor material is prepared; b) preparing The obtained zeolite precursor material is ion-exchanged and modified, and then calcined to obtain a naphthalene alkylation catalyst; c) applying the obtained naphthalene alkylation catalyst to a naphthalene alkylation reaction. Wherein, the ion-exchanged ion is selected from at least one technical solution of alkaline earth metals and lanthanide metal elements, which better solves the problem of poor selectivity of existing catalysts and can be well applied to decalin In chemical industry production.

Description

technical field [0001] The present invention relates to a method for alkylation of naphthalene. Background technique [0002] 2,6-dialkylnaphthalene can be oxidized to synthesize 2,6-naphthalene diacid (2,6-DNA), and 2,6-naphthalene diacid is a new type of high-performance polyester material-polyethylene naphthalate The raw material of glycol ester (PEN), compared with polybutylene terephthalate (PET), the performance of PEN is much better. PEN has superior heat resistance, mechanical properties, chemical stability, gas barrier and UV and radiation resistance; PEN has good transparency like PET, and the advantage of PEN over PET is that its use temperature is 35-55 °C higher , the tensile strength is 50% higher, and the barrier performance is 5 times higher; other markets of PEN are in the manufacture of laminates, copolymers and blends, and the application prospects are very broad. Since the 1990s, major foreign plastic manufacturers and application companies have investe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/66C07C2/86C07C5/27C07C6/12C07C15/24B01J29/40B01J29/70
Inventor 刘远林高焕新姚晖
Owner CHINA PETROLEUM & CHEM CORP
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